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Cheap flights from London Gatwick Airport to Washington, D.C. from $508

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Gatwick Airport to Washington, D.C. departing on 2/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from London Gatwick Airport to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
TAP AIR PORTUGAL Logo
10:40 am - 9:00 pm
LGW
-
IAD
15h 20m
1 stop
TAP AIR PORTUGAL Logo
5:30 pm - 9:50 am
IAD
-
LGW
11h 20m
1 stop
$543TAP AIR PORTUGAL
vie., feb. 27 - mar., mar. 3
Icelandair Logo
3:40 pm - 10:15 pm
LGW
-
IAD
11h 35m
1 stop
Icelandair Logo
11:20 pm - 2:40 pm
IAD
-
LGW
10h 20m
1 stop
$544Icelandair
vie., may. 22 - dom., may. 31
Icelandair Logo
11:55 am - 6:30 pm
LGW
-
IAD
11h 35m
1 stop
Icelandair Logo
7:40 pm - 10:55 am
IAD
-
LGW
10h 15m
1 stop
$545Icelandair
mié., feb. 18 - sáb., feb. 28
Icelandair Logo
3:40 pm - 7:20 pm
LGW
-
IAD
32h 40m
1 stop
Icelandair Logo
8:30 pm - 2:40 pm
IAD
-
LGW
13h 10m
1 stop
$549Icelandair
mié., abr. 29 - dom., may. 10
Multiple Airlines Logo
2:00 pm - 7:20 am
LGW
-
IAD
22h 20m
1 stop
Multiple Airlines Logo
10:10 am - 10:00 am
IAD
-
LGW
18h 50m
1 stop
$563Multiple Airlines
jue., feb. 26 - jue., mar. 5
Icelandair Logo
3:40 pm - 10:15 pm
LGW
-
IAD
11h 35m
1 stop
Icelandair Logo
8:30 pm - 11:45 am
IAD
-
LGW
10h 15m
1 stop
$566Icelandair
vie., may. 22 - sáb., may. 30
Multiple Airlines Logo
2:00 pm - 7:24 am
LGW
-
IAD
22h 24m
1 stop
Multiple Airlines Logo
8:15 am - 6:00 am
IAD
-
LGW
41h 45m
2 stops
$568Multiple Airlines
jue., mar. 5 - dom., mar. 22
Icelandair Logo
11:55 am - 6:30 pm
LGW
-
IAD
11h 35m
1 stop
Icelandair Logo
7:40 pm - 10:55 am
IAD
-
LGW
10h 15m
1 stop
$578Icelandair
vie., feb. 20 - lun., mar. 2
Multiple Airlines Logo
8:50 am - 6:30 pm
LGW
-
IAD
14h 40m
2 stops
Multiple Airlines Logo
7:40 pm - 5:20 pm
IAD
-
LGW
16h 40m
2 stops
$581Multiple Airlines
mié., feb. 25 - mié., mar. 4
SWISS Logo
6:40 pm - 2:35 pm
LGW
-
IAD
24h 55m
2 stops
SWISS Logo
5:45 pm - 5:50 pm
IAD
-
LGW
19h 05m
1 stop
$586SWISS
mié., feb. 25 - mié., mar. 4

TAP AIR PORTUGAL flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Our best TAP AIR PORTUGAL deals on London Gatwick Airport to Washington, D.C. Dulles Intl Airport flight tickets
TAP AIR PORTUGAL
Feb 27
LGW10:40 amLondon Gatwick
15h 20m
1 stop
IAD9:00 pmWashington, D.C. Dulles Intl
Mar 3
IAD5:30 pmWashington, D.C. Dulles Intl
11h 20m
1 stop
LGW9:50 amLondon Gatwick
$543
TAP AIR PORTUGAL
Feb 25
LGW4:35 pmLondon Gatwick
27h 40m
1 stop
IAD3:15 pmWashington, D.C. Dulles Intl
Mar 2
IAD5:30 pmWashington, D.C. Dulles Intl
11h 20m
1 stop
LGW9:50 amLondon Gatwick
$634
TAP AIR PORTUGAL
Feb 26
LGW4:00 pmLondon Gatwick
34h 00m
1 stop
IAD9:00 pmWashington, D.C. Dulles Intl
Mar 3
IAD5:30 pmWashington, D.C. Dulles Intl
11h 20m
1 stop
LGW9:50 amLondon Gatwick
$641

Iberia flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Our best Iberia deals on London Gatwick Airport to Washington, D.C. Dulles Intl Airport flight tickets
Iberia
Mar 2
LGW7:40 pmLondon Gatwick
25h 50m
1 stop
IAD4:30 pmWashington, D.C. Dulles Intl
Mar 10
IAD7:00 pmWashington, D.C. Dulles Intl
11h 50m
1 stop
LGW10:50 amLondon Gatwick
$628
Iberia
Apr 24
LGW8:40 pmLondon Gatwick
23h 50m
1 stop
IAD3:30 pmWashington, D.C. Dulles Intl
May 2
IAD5:00 pmWashington, D.C. Dulles Intl
22h 00m
1 stop
LGW8:00 pmLondon Gatwick
$653
Iberia
Feb 2
LGW11:45 amLondon Gatwick
33h 45m
1 stop
IAD4:30 pmWashington, D.C. Dulles Intl
Feb 10
IAD6:00 pmWashington, D.C. Dulles Intl
20h 00m
1 stop
LGW7:00 pmLondon Gatwick
$770

momondo Fare Finder

 
Customize your flight search to find flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated enero 29, 2026.
Use the filters below to find and compare flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

vie. 2/27

10:40 am-9:00 pm

1 stop15h 20m

Washington, D.C. Dulles Intl

mar. 3/3

5:30 pm-9:50 am

1 stop11h 20m

$543

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

vie. 5/22

3:40 pm-10:15 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

dom. 5/31

11:20 pm-2:40 pm

1 stop10h 20m

$544

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

mié. 2/18

11:55 am-6:30 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

sáb. 2/28

7:40 pm-10:55 am

1 stop10h 15m

$545

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

mié. 4/29

3:40 pm-7:20 pm

1 stop32h 40m

Washington, D.C. Dulles Intl

dom. 5/10

8:30 pm-2:40 pm

1 stop13h 10m

$549

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

jue. 2/26

2:00 pm-7:20 am

1 stop22h 20m

Washington, D.C. Dulles Intl

jue. 3/5

10:10 am-10:00 am

1 stop18h 50m

$563

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

vie. 5/22

3:40 pm-10:15 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

sáb. 5/30

8:30 pm-11:45 am

1 stop10h 15m

$566

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

jue. 3/5

2:00 pm-7:24 am

1 stop22h 24m

Washington, D.C. Dulles Intl

dom. 3/22

8:15 am-6:00 am

2 stops41h 45m

$568

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

vie. 2/20

11:55 am-6:30 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

lun. 3/2

7:40 pm-10:55 am

1 stop10h 15m

$578

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

mié. 2/25

8:50 am-6:30 pm

2 stops14h 40m

Washington, D.C. Dulles Intl

mié. 3/4

7:40 pm-5:20 pm

2 stops16h 40m

$581

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

mié. 2/25

6:40 pm-2:35 pm

2 stops24h 55m

Washington, D.C. Dulles Intl

mié. 3/4

5:45 pm-5:50 pm

1 stop19h 05m

$586

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Washington, D.C. Dulles Intl Airport?

In general, April is the cheapest month to fly from London Gatwick Airport to Washington, D.C. Dulles Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $476. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of April, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $522.

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Our data shows that Thursday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $744. When flying out on a Tuesday, the most expensive travel day of the week, you can expect to see flight prices from London Gatwick Airport to Washington, D.C. Dulles Intl Airport for around $904.

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Flying to Washington, D.C. Dulles Intl Airport from London Gatwick Airport in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $818 when looking at flights departing in the afternoon. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $851 on average. Flights to Washington, D.C. Dulles Intl Airport from London Gatwick Airport at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from London Gatwick Airport to Washington, D.C. Dulles Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap London Gatwick Airport to Washington, D.C. Dulles Intl Airport (LGW to IAD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Fastest flight time

11h 20m

Direct flights

None
The fastest flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport takes 11h 20m
There are no direct flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport. There are no popular flight routes from London Gatwick Airport to Washington, D.C. Dulles Intl Airport.
Search flight deals

  • How far is London Gatwick to Washington, D.C. Dulles Intl by plane?

    The distance between London Gatwick and Washington, D.C. Dulles Intl is about 3682.8 mi. A reasonable flight in good conditions will take 11h 20m.

  • When did momondo last update prices for flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

    Prices for flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport are updated daily.

  • How old do you have to be to fly from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Gatwick Airport to Washington, D.C. Dulles Intl Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The travel and health documents required for your trip to Washington, D.C. Dulles Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington, D.C. Dulles Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Gettysburg
Arlington
Winchester
Waldorf
Woodbridge
Tysons
Laurel
Colonial Beach
Silver Spring
Towson
Fredericksburg
Gaithersburg
Rockville
Manassas
Springfield
Sterling
Fairfax
Linthicum Heights

Why use momondo?

Why should I use momondo to find a flight deal from London to Washington, D.C.?

It is quick and easy to find London to Washington, D.C. flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Washington, D.C. that suits you.

Can I find flights from London to Washington, D.C. with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for London to Washington, D.C. flights to just show those with flexible booking policies.

How can momondo help me find flights from London to Washington, D.C.?

momondo helps you find the best flight between London and Washington, D.C. by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from London to Washington, D.C. right now. Can momondo alert me if prices change?

Price alerts on flights to Washington, D.C. from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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